The Autobot: Easily one of the slickest-looking of the Autobots, Sideswipe takes the form of a silver Chevrolet Corvette. He's the team's combat instructor and is seriously agile. He has wheels for feet, so he's able to skate through battle scenes wielding his detachable swords. See? Slick.
Greatest Moment: In Transformers: Revenge Of The Fallen, Sideswipe goes up against Sideways (of course), slicing him in half with his enormous blades. Damn I'm good, he gruffs. Modest, too.
5. Sentinel Prime
The Autobot: Voiced by Leonard Nimoy (hello awesomeness), Sentinel Prime is the former leader of the Autobots and Optimus Prime's mentor. He appears in Dark Of The Moon as a Rosenbauer Panther fire truck and betrays the Autobots. Saving grace? He's based on Sean Connery...
Greatest Moment: Sentinel Prime is responsible for considerably upping the stakes in T3, activating the space bridge in Chicago in order to repair Cyberton using Earth's resources. Sure, it's evil, but man it's cool.
The Autobot: A cranky weapons specialist who takes on the appearance of medium-duty truck the GMC TopKick c4500. Ironhide is a loveable curmudgeon who climbs the ranks through the first three Transformers flicks before being killed by Sentinel Prime in Dark Of The Moon.
Greatest Moment: Going down fighting when Sentinel Prime destroys him in T3. You didn't really expect Ironhide to go down in anything but a blaze of glory, did you?
The Autobot: Easily one of the coolest ever Transformers (and only partly because he's a Ferrari), Mirage - who's also known as Dino - is a rare autobot who doesn't think too highly of human beings. He's damn near impossible to best in battle thanks to his ability to cloak himself, plus the fact that he has an electro disruptor...
Greatest Moment: Mirage plays a pivotal part in T3's battle of Chicago, taking down numerous Decepticons. We love this guy.
The Autobot: Mute for most of the first Transformers, Bumblebee is a 1974 Chevrolet Camaro, and the first car of a certain Sam Witwicky (Shia LaBeouf). He's also one of Optimus Prime's most trusted compadres.
Greatest Moment: Though he does some seriously nifty fighting throughout the Transformers films, we love his cheeky 'radio play' in the first film. Unable to speak, Bumblebee instead communicates using songs on the radio.
1. Optimus Prime
The Autobot: The big cheese. Leader of the Autobots and general trucking badass. Optimus Prime (brilliantly voiced by Peter Cullen), who transforms into a 1997 Peterbily 379, is on a mission to destroy the All Spark and end the war between the Autobots and the Decepticons.
Greatest Moment: Prime breaks out the weaponry in Transformers: Dark Of The Moon when he avenges Ironhide by killing (gasp) Sentinel Prime. That, or the bit where he rides on a Dinobot while wielding a flaming sword. Because HELL YEAH.